<!--
@UIA-WIN-ALLOW:LocalizedControlType='output'
@WIN-ALLOW:localized_extended_role=*
-->
<!DOCTYPE html>
<html>
<body>
<form onsubmit="return false" oninput="o.value = (a.valueAsNumber || 0) + (b.valueAsNumber || 0)">
 <input name=a type=number step=any> +
 <input name=b type=number step=any> =
 <output name=o for="a b"></output>
</form>
</body>
</html>
